Abstract:
An 18-year-old Warmblood stallion was presented for an acute onset nonweightbearing right
hindlimb lameness following a mild lameness of 2 weeks' duration. Severe swelling was present
in the right femoral area. Despite extensive diagnostic procedures, no definitive diagnosis could
be made. Packed red cell volume was persistently low. The horse improved with supportive
treatment and was discharged at the owner's request. The horse presented 4 days later for
bleeding from a previously made incision on the lateral femoral area. Due to deterioration of his
condition, the stallion was subjected to euthanasia. Diagnosis of disseminated
haemangiosarcoma, affecting primarily the hindlimb musculature and leading to pathological
fracture of the femur was made at necropsy and subsequent histopathology.
